Double-layer volute structure of turbocharger compressor

Abstract

The invention discloses a double-layer volute structure of a turbocharger compressor. The double-layer volute structure comprises an air intake shell (1) and a volute (2), wherein the air intake shell (1) is connected with the volute (2) through a pressing plate and screws; the air intake shell (1) has an intake air bypass recycling structure; and an air flow passage of the volute (2) is divided into two stages of which the first stage is an annular flow passage and the second stage is the conventional snail-shaped flow passage. In terms of design features, the annular flow passage is designed according to equivalent width from a diffuser outlet to a part with the maximum radius of the flow passage and is designed according to a constant section from the part with the maximum radius of the flow passage to a flow passage outlet. By using the double-layer volute structure of the turbocharger compressor, the complexity of processing technology is reduced, the supercharging pressure and the capacity of doing work are improved, the loss of the compressed air in the annular flow passage is reduced, and the circulating capacity of the annular flow passage is improved.

Description

Technical field: [0001] The invention belongs to the technical field of power machinery, and in particular relates to a turbocharger compressor double-layer volute structure. Background technique [0002] As the power density of the engine increases, the technical indicators of the turbocharger need to be continuously strengthened, which requires a turbocharger with higher performance. Therefore, the development of a turbocharger with a high pressure ratio, high efficiency, high reliability, and a wide range of available flow rates is a necessary condition for increasing engine power and improving engine dynamic performance, but this is beyond the single-compressor turbocharger. The pressure ratio, flow range and efficiency level that the compressor can achieve. Many engine applications are forced to adopt a two-stage turbocharging system. From a performance point of view, a two-stage turbocharging system has many advantages, but it also has the following disadvantages comp...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a double-layer volute structure of a turbocharger compressor, which meets the gas collection requirements of a back-to-back two-stage compressor, and solves the problem that the pressure ratio increases and the flow rate narrows after the turbocharger adopts dual compressors

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